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Finding the Fourth Proportional to 550,515.92, 759,532.60 and 321,021.36

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Solution

The fourth proportional to 550,515.92, 759,532.60 and 321,021.36 is: 442,904.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,515.92 : 759,532.60 = 321,021.36 : x
  2. Step 2: Convert to fraction form
    550,515.92/759,532.60 = 321,021.36/x
  3. Step 3: Cross multiply
    550,515.92x = 759,532.60 × 321,021.36
  4. Step 4: Simplify right side
    550,515.92x = 243,826,188,216.34
  5. Step 5: Solve for x
    x = 243,826,188,216.34/550,515.92
  6. Step 6: Final answer
    x = 442,904.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.